Member walked on tables, on their colleagues' heads and the speaker's seat. The number of injuries has not been released.

Eventually members agreed to suspend the session and resume Thursday. "Our negotiations were successful" said Oleksandr Efremov, a member of the Temporary Parliamentary Panel. "We negotiated to continue negotiations."

According to Ukrainian law, members of parliament are inviolable and cannot be punished, and police cannot intervene. Therefore, fights among members, many of whom are or were professional athletes, are common. Notably, Heavyweight World Boxing Champion Vitali Klitchko, also a party leader, was not involved in Wednesday's fisticuffs.

Elections in October left the ruling Party of Regions, led by President Viktor Yanukovich, in power. The second-place party, the United Opposition coalition, is organized by former Prime Minister Yuliya Tymoshenko, who is in prison on charges of abuse of authority, a punishment seen by the United States and Europe as politically motivated.